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arXiv 1003.2939gr-qc
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在探测来自合并紧密双星的引力波中时域模板和模拟信号的锥形窗口

A tapering window for time-domain templates and simulated signals in the detection of gravitational waves from coalescing compact binaries

D. J. A. McKechan, C. Robinson, B. S. Sathyaprakash

摘要:

来自双黑洞的螺旋信号,特别是那些质量在$10M_\odot \lsim M \lsim 1000 M_\odot,$范围内的黑洞,可能只会在探测器最敏感的频带内持续几个周期。方窗时域信号的频谱可能包含不需要的功率,这可能在引力波数据分析中引起问题,特别是当波形持续时间较短时。可能会有功率泄漏到预期没有这种功率的频率仓中,从而导致过量的假警报。我们提出了一种方法,锥形的时域波形,显着减少不必要的泄漏功率,导致频谱,同意非常好的一个长时间的信号。我们的锥形窗口还减少了由具有杂散信号功率的模板拾取的仪器和环境瞬变引起的假警报。背景抑制是噪声主导搜索中的重要目标,并且可以导致搜索算法的检测效率的提高。

英文摘要:

Inspiral signals from binary black holes, in particular those with masses in the range $10M_\odot \lsim M \lsim 1000 M_\odot,$ may last for only a few cycles within a detector's most sensitive frequency band. The spectrum of a square-windowed time-domain signal could contain unwanted power that can cause problems in gravitational wave data analysis, particularly when the waveforms are of short duration. There may be leakage of power into frequency bins where no such power is expected, causing an excess of false alarms. We present a method of tapering the time-domain waveforms that significantly reduces unwanted leakage of power, leading to a spectrum that agrees very well with that of a long duration signal. Our tapered window also decreases the false alarms caused by instrumental and environmental transients that are picked up by templates with spurious signal power. The suppression of background is an important goal in noise-dominated searches and can lead to an improvement in the detection efficiency of the search algorithms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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